/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineFriendsInterface.h
Starts an async task that deletes the named friends list for the player
true if the delete request was started successfully, false otherwise
bool DeleteFriendsList ( int32 LocalUserNum, const [FString](API\Runtime\Core\Containers\FString) & ListName, const [FOnDeleteFriendsListComplete](API\Plugins\OnlineSubsystem\Interfaces\FOnDeleteFriendsListComplete) & Delegate )